EP1084998B1 - Keramische Fasern zur Verstärkung von feuerfesten Werkstoffen - Google Patents

Keramische Fasern zur Verstärkung von feuerfesten Werkstoffen Download PDF

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Publication number
EP1084998B1
EP1084998B1 EP00420186A EP00420186A EP1084998B1 EP 1084998 B1 EP1084998 B1 EP 1084998B1 EP 00420186 A EP00420186 A EP 00420186A EP 00420186 A EP00420186 A EP 00420186A EP 1084998 B1 EP1084998 B1 EP 1084998B1
Authority
EP
European Patent Office
Prior art keywords
mpa
fibers
résistance
compression
refractory
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00420186A
Other languages
English (en)
French (fr)
Other versions
EP1084998A1 (de
Inventor
Jean-André Alary
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Niche Fused Alumina SAS
Original Assignee
PEM Abrasifs Refractaires SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PEM Abrasifs Refractaires SA filed Critical PEM Abrasifs Refractaires SA
Publication of EP1084998A1 publication Critical patent/EP1084998A1/de
Application granted granted Critical
Publication of EP1084998B1 publication Critical patent/EP1084998B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02—Linings
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/38—Fibrous materials; Whiskers
    • C04B14/46—Rock wool ; Ceramic or silicate fibres
    • C04B14/4618—Oxides
    • C04B14/4625—Alumina
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/62227—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining fibres
    • C04B35/62231—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining fibres based on oxide ceramics
    • C04B35/62236—Fibres based on aluminium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
    • C04B35/80—Fibres, filaments, whiskers, platelets, or the like

Definitions

  • the invention relates to the field of refractory materials and in particular mechanically reinforced refractory concretes by adding fibers.
  • the object of the invention is to obtain refractory materials reinforced by fibers made more resistant by the use of fibers better suited than fibers metal of the prior art.
  • the subject of the invention is a refractory concrete based on metal oxides reinforced by the incorporation of 0.1 to 50% by weight of sintered bauxite fibers. having a length / diameter ratio greater than 10.
  • These fibers have a cylindrical or prismatic shape truncated by two surfaces, by for example, surfaces that are substantially flat and perpendicular to the axis of the cylinder or prism.
  • Prismatic shapes may have a section with concavities, for example a star shape.
  • For circular section fibers denotes by "diameter" that of the circle of the section.
  • it is the diameter of the circle of the same surface as the section (equivalent diameter).
  • the invention also relates to the use of said reinforced refractory concrete to make parts for casting silicon or silicon alloys.
  • Formulations selected according to the measured mechanical characteristics have been tried in the construction of nozzles of ladles, where they are proved to be more efficient in terms of the service life of the parts tested.
  • the fibers according to the invention can be manufactured by the usual technique of sintered bauxite for abrasives, as described in US Pat. 3239970 of Carborundum, that is to say by crushing natural bauxite, calcination, mixing with a binder to form a paste, extrusion of the dough, cutting of fibers and sintering at a temperature of the order of 1400 ° C.
  • the patent states that the Extruded products section can be round, square, triangular or polygonal.
  • a section shape particularly well suited for the implementation of the invention is a section with concavities, for example a star shape, which improves anchoring the fiber in the refractory material.
  • Diameter (or equivalent diameter) fibers are preferably between 0.2 and 1 mm.
  • the constituents of the concrete are mixed dry in a kneader, the fibers are then incorporated into the mixture, then the water, and the whole is cooked to a temperature of the order of 1500 ° C.
  • the refractory concretes according to the invention can be used in particular for parts liquid metal casting equipment with a high melting point, for example silicon or silicon alloys.
  • Refractory concrete specimens of different shapes and sizes were prepared according to the following formulation: Brown corundum in grains of 2 to 5 mm 23% Brown corundum in grains of 0.2 to 2 mm 37% Brown corundum in grains from 0 to 0.2 mm 24% Particles of amorphous silica from 0 to 0.2 mm 5% Alumina grain from 0 to 0.2 mm 6% Aluminate of lime at 80% Al 2 O 3 5%
  • test pieces were dried in an oven for 24 hours at 110 ° C. and then subjected to a treatment.
  • thermal consisting of a temperature rise of 2 ° C per minute up to 1500 ° C, followed by holding at 1500 ° C for 1 h.
  • Refractory concrete specimens of different shapes and sizes have been prepared according to the formulation of Example 1, to which was added 4% (by weight) of fibers made of semi-cylindrical stainless steel wire with a diameter of 1.5 mm, and of length between 25 and 30 mm.
  • Crushing and calcination of natural bauxite was made by mixing with a binder, extrusion and sintering at 1400 ° C, a reference batch consisting of sintered bauxite fibers with a density of 3.85 and a cylindrical shape with a diameter of 0.50 mm and a length of between 5 mm and 12 mm, having a mass per unit length of 0.76 mg / mm.
  • Refractory concrete specimens of different shapes and sizes have been prepared according to the formulation of Example 1, to which was added 15% (by weight) of fibers prepared according to the formula given in Example 3.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Civil Engineering (AREA)
  • Ceramic Products (AREA)
  • Inorganic Fibers (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Claims (4)

  1. Feuerfester Beton auf Basis von Metalloxiden, dadurch gekennzeichnet, dass er durch Zugabe von 0,1 bis 50 Gew.-% Sinterbauxitfasern mit einem Länge-Durchmesser-Verhältnis größer als 10 verstärkt ist.
  2. Feuerfester Beton nach Anspruch 1, dadurch gekennzeichnet, dass die Fasern einen Querschnitt zylindrischer oder prismatischer Form aufweisen, abgestutzt durch zwei Flächen, insbesondere im Wesentlichen ebene und zur Achse des Zylinders oder Prismas senkrecht stehende Flächen.
  3. Feuerfester Beton nach Anspruch 2, dadurch gekennzeichnet, dass die Fasern einen sternförmigen Querschnitt aufweisen.
  4. Verwendung eines feuerfesten Betons nach einem der Ansprüche 1 bis 3 für Werkstücke, die für den Guss von Silizium oder Siliziumlegierungen bestimmt sind.
EP00420186A 1999-09-20 2000-09-06 Keramische Fasern zur Verstärkung von feuerfesten Werkstoffen Expired - Lifetime EP1084998B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9911908A FR2798653B1 (fr) 1999-09-20 1999-09-20 Fibres ceramiques pour le renforcement de materiaux refractaires
FR9911908 1999-09-20

Publications (2)

Publication Number Publication Date
EP1084998A1 EP1084998A1 (de) 2001-03-21
EP1084998B1 true EP1084998B1 (de) 2005-12-07

Family

ID=9550180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00420186A Expired - Lifetime EP1084998B1 (de) 1999-09-20 2000-09-06 Keramische Fasern zur Verstärkung von feuerfesten Werkstoffen

Country Status (7)

Country Link
US (1) US6649552B1 (de)
EP (1) EP1084998B1 (de)
JP (1) JP4630394B2 (de)
AT (1) ATE312063T1 (de)
DE (1) DE60024547T2 (de)
ES (1) ES2254123T3 (de)
FR (1) FR2798653B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8481152B2 (en) * 2008-08-14 2013-07-09 General Electric Company Refractory material with improved resistance to molten slag

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674539A (en) * 1946-07-19 1954-04-06 Babcock & Wilcox Co High temperature refractory products
US3183071A (en) * 1961-06-19 1965-05-11 Wakefield Corp Abrasive article
BE635824A (de) * 1962-08-06
US3481723A (en) * 1965-03-02 1969-12-02 Itt Abrasive grinding wheel
US3387957A (en) * 1966-04-04 1968-06-11 Carborundum Co Microcrystalline sintered bauxite abrasive grain
GB1328493A (en) * 1969-08-21 1973-08-30 Morganite Ceramics Fibres Ltd Refractory insulating compositions
US3793204A (en) * 1972-07-28 1974-02-19 Atomic Energy Commission Thermal insulation
US4094690A (en) * 1972-08-07 1978-06-13 Imperial Chemical Industries Limited Liquid composition
GB1483055A (en) * 1973-11-12 1977-08-17 Foseco Int Porous refractory ceramic materials
US4314827A (en) * 1979-06-29 1982-02-09 Minnesota Mining And Manufacturing Company Non-fused aluminum oxide-based abrasive mineral
JPS56103270A (en) * 1980-01-22 1981-08-18 Teijin Ltd Friction material
US4331773A (en) * 1980-12-21 1982-05-25 Nihon Tokushurozai Kabushiki Kaisha Refractory composition
GB8301543D0 (en) * 1983-01-20 1983-02-23 Foseco Trading Ag Refractory heat-insulating articles
JPS6191071A (ja) * 1984-10-12 1986-05-09 テイ−イ−ピ−株式会社 耐熱衝撃性セラミツクの製造法
JPS63206367A (ja) 1987-02-18 1988-08-25 ニチアス株式会社 軽量耐火物およびその製造法
US4804645A (en) * 1987-03-27 1989-02-14 Sandvik Aktiebolag Ceramic material based on alumina and refractory hard constituents
US4943543A (en) * 1987-04-30 1990-07-24 Sandvik Aktiebolag Sintered ceramic materials
US5376598A (en) * 1987-10-08 1994-12-27 The Boeing Company Fiber reinforced ceramic matrix laminate
JPH0251474A (ja) * 1988-08-11 1990-02-21 Kurosaki Refract Co Ltd 炭素含有耐火物
US5053362A (en) * 1988-09-27 1991-10-01 The Carborundum Company Ceramic fiber refractory moldable compositions
US5035723A (en) * 1989-04-28 1991-07-30 Norton Company Bonded abrasive products containing sintered sol gel alumina abrasive filaments
US5103598A (en) * 1989-04-28 1992-04-14 Norton Company Coated abrasive material containing abrasive filaments
US5045506A (en) * 1989-07-31 1991-09-03 Alcan International Limited Process for producing mineral fibers incorporating an alumina-containing residue from a metal melting operation and fibers so produced
US5129919A (en) * 1990-05-02 1992-07-14 Norton Company Bonded abrasive products containing sintered sol gel alumina abrasive filaments
JPH089498B2 (ja) * 1990-07-11 1996-01-31 株式会社イナックス アルミン酸石灰塩含有セメントの硬化遅延法
JPH05320623A (ja) * 1991-04-17 1993-12-03 Mitsui Mining Co Ltd セラミック繊維研磨材
US6183852B1 (en) * 1992-09-15 2001-02-06 The Boeing Company Refractory fibrous ceramic insulation and process of making same
JP3308632B2 (ja) * 1993-03-16 2002-07-29 電気化学工業株式会社 高耐火性組成物及び耐火構造材
US5605870A (en) * 1993-05-28 1997-02-25 Martinex Science, Inc. Ceramic fibers, and methods, machines and compositions of matter for making same
US5679041A (en) * 1994-09-29 1997-10-21 General Motors Corporation Metal matrix composite and preform therefor
US6067821A (en) * 1996-10-07 2000-05-30 Owens Corning Fiberglas Technology, Inc. Process for making mineral wool fibers from lumps of uncalcined raw bauxite
US5972102A (en) * 1996-10-29 1999-10-26 North American Refractories Co. Hydraulically-bonded monolithic refractories containing a calcium oxide-free binder comprised of a hydratable alumina source and magnesium oxide
US5858289A (en) * 1997-02-24 1999-01-12 Global Consulting, Inc. Process for preparing compressed shape of ceramic fiber
FR2771406B1 (fr) * 1997-11-27 2000-02-11 Bouygues Sa Beton de fibres metalliques, matrice cimentaire et premelanges pour la preparation de la matrice et du beton
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JPH11292604A (ja) * 1998-04-15 1999-10-26 Shinsei Dental Laboratory:Kk 耐熱性コンクリート組成物

Also Published As

Publication number Publication date
ATE312063T1 (de) 2005-12-15
JP4630394B2 (ja) 2011-02-09
US6649552B1 (en) 2003-11-18
JP2001140130A (ja) 2001-05-22
FR2798653B1 (fr) 2002-04-19
EP1084998A1 (de) 2001-03-21
DE60024547D1 (de) 2006-01-12
ES2254123T3 (es) 2006-06-16
FR2798653A1 (fr) 2001-03-23
DE60024547T2 (de) 2006-08-17

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